Gert Schwarz, H. Kricheldorf
May 1, 1991
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Journal
Macromolecules
Abstract
Three samples of poly(6-oxy-2-naphthoate) were prepared under different reaction conditions, whiskers were obtained in one case. The properties of all three samples are studied. A reversible phase transition from an orthorhombic to a nearly pseudohexagonal chain packing occurs at 330-350 °C, and a second reversible transition associated with the change of rotational freedom of naphthalene rings occurs at 440-460 °C. Both phase transitions depend significantly on the reaction conditions used for the preparation of the sample. The whiskers proved to be the chemically and physically most perfect form of all three poly(6-hydroxy-2-naphthoic acid) samples